This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
Been thrashing the waters in central BC for about 50 yrs and thinking of retireing and learning a little
finness. Like dry fly fishing and seeing the fish take the fly, but know that I would probably catch
more fish under the surface. Looking forward to catching the biggest fish I ever caught on a fly rod!!!
Hopefully, Its never too late to learn something new!